How the math works

Every number is explainable. The weights and assumptions are shown openly — nothing is hidden, and no account or personal data is required.

Worked example

Cash courier (informal)

No visible fee, but the worst rate — and no protection.

Amount sent: $200.00
Visible flat fee: $0.00
Exchange-rate margin: $10.00 (5.0% of amount)
Total real cost: $10.00
Mid-market rate: 1 USD = 17.1 MXN
Arrives home: $190.00 → 3,249.00 MXN

The formula, in plain language: total cost = flat fee + (amount × exchange-rate margin). What arrives = amount − total cost. We rank every option by what arrives, so the family keeps the most.

Assumptions for every option (illustrative)

Method	Flat fee	FX margin	Speed
Mobile / app transfer	$1.99	0.5%	Minutes
Online specialist	$2.99	0.9%	Hours
Money-transfer shop	$8.00	2.0%	Same day
Bank wire	$25.00	3.0%	1-3 days
Cash courier (informal)	$0.00	5.0%	Days

bridge.fingerprint

$ fingerprint USD-MXN $200
fnv1a64: c6a26317c029fd1d
deterministic · same inputs always produce this fingerprint

Rates are illustrative and for information only — not financial advice and not a live quote. Bridge takes no fee and moves no money.